Centrifugal pump



2 Sheets-Sheet l jwveQ/Z (2605 ,E L267Z5Z5 J. R. SENSIBAR CENTRIFUGAL PUMP Filed June 23, 1926 Nov. 26, 1929.

Patented Nov. 2a, 1929 CENTRIFUGAL ,PU

Application filed June 23,

This invention relates to centrifugal pumps and the like and is particularly adapted for use in pumping mixtures of sand, gravel, and water. i

5 The primary object of this invention is to provide a centrifugal pump which will withstand the excessive wear incident to pumps of this type where the sand, gravel, and the like carried by the water is of an abrasive in nature, and at the same time to provide a ready means of renewing those parts of the pump where excessive wear is bound to occur.

Another object is to provide means for preventing sand from getting into certain 5 parts of the pump which move relatively to each other and where the presence of such sand would necessarily cause a great deal of wear.

Another object is to provide a pump of 5" this character which is so constructed that it can be readily turned to any desired angle.

Another object is to provide a pump which, while having these several advantages, is at the same time comparatively inexpensive to 2.; manufacture and relatively easy to assemble and disassemble.

These and other objects are accomplished by this invention which is fully described in the following specification and shown in the accompanying drawings in which Figure 1 is a front elevation of the pump as viewed from the intake side showing part of the supporting saddle removed for the sake of clearness;

3.; Fig. 2 is a vertical section on the line 22 of Fig. 1.

The embodiment illustrated comprises a- The lower casing portion 14 is provided with a flange 18 which is concentric with the.

axis of the pump and is adapted to rest upon 50 the concentric saddle 19 which serves to sup- 1926, Serial No. 11?,984.

port the pump casing. Likewise the lower casing portion 17 has asimilar flange 20 which rests upon the concentric saddle 21.

The pump shaft 22 is journaled in a suitable .bearing 23 and in @Qombined bearing 55 and thrust bearing 24 and carries upon its I inner endan impeller .25, whichis secnredto the flange 22 by means of cap screws 26,. A

central sleeve 27 is bolted to theca'sing sections 16 and 17 by meansof cap screws 28 and 5 carries a packing gland 2.9 whichsurrounds the shaft22. The impeller'has a heavy-central hub which is internally tapered to receivethe tapered end 22 of the shaft and ,is further secured thereon'by means f the liiy Th mpe ler haasi e f ange 2 which end sub t ally right ng es to vthe axis of the impellershaft; so thatthejmaterial P ssing the te hr ush will be guided ut- Wa clly t ward the leads 9 th spira casing t sections 10'and11, I

An intake pipe 0 is bo'ltedto the-inner casnssm Qns 1 au it, its ax 'slibe ns u t nti l y c n id n wi ht eaxis offlie mpel e h t 22, th cent r f li impellerilbeing cu a ay a o n-termi the ri g" 31 ,whic i b l d to t e i ner surfa o t e ea inss e o s 13 ,l an 1 1 s' a o nwardly sane s ir a fl n e Whichlie ju t inside t r ng ri g 2 W ichis s ;cure to, he rom .8 e o them-pell t- Tl' s ins asu s antially in contact on 'itsjinner face with'the fl g m bem an Vo i s oute fac wit the plate ring '33 which is bored out torei e t, t plat 'i gb ingri eted tat-h annular plate 34, the inner face OfIthe-plate '34 beingsubstantially flushwith the inner edges of the spiral casing members 10 and 11 'into'whi'efhit is recessed. The plate 34: and

in place by means of 31 plate ring 3'3 are ,held cap'screws 35; I

A similar annular plate '36 is located on the Opposite side and this carries a plate ring 37 which is likewise securedin place'by cap screws 38. Annularspaces 39 and A0 are .9 thus provided between the inner reasing mernbers 13, 14 and the plate 34 onthe one hand andthemembers 1,6, 17 and plate 36 on the other. Clear water is supplied tothese recesses through the pipes 41 from anysuitable source of water supply (not shown). This drawn inwardly to keep the bearing surfaces water, admitted as it is substantially at the of the impeller hub and wearing ring free point of intake to the impeller, is drawn into from dirt.

the pump also by the action of the pump itself and serves to keep the bearing surface of the wearing ring 32 free from said and the like, thereby preventing excessive wear of this rmg.

On the side of the shaft, this water passing the plate ring 37 prevents much of the sand from getting to the wearing strip 42 which is carried by the hub of the impeller and which has a bearing on the sleeve 27*, the space 43 between the wearing strip 42 and the packing gland 29 being preferably filled with a heavy oil or grease. The shaft 22 is driven through the coupling 44 by an electric motor or other suitable source of power (not shown). r y

The thrust bearing 24 is provided with a continuous stream of oil through pipes 66, 69, 70 and 71, the circulation of oil being effected by the pump 67 driven by a belt 68 from shaft 22 as shown in Fig. 2.

Thus it will be seen that a Very simple form of centrifugal pump is provided and one which can readily be assembled and disassembled for the replacement of parts, or for repair. The arrangement shown, however, prevents sand and grit from getting into those parts where excessive wear might occur. When wear does occur, as in the spiral casing members 10 and 11, these can readily be removed and steel welded thereon, and in such a way as to return the castings to substantially their original form.

What I claim is:

A centrifugal pump comprising an outer spiral casing, inner or side casing members secured to said outer casing on the intake and shaft sides thereof, respectivelyfthe inner casing member on the shaft side including a central sleeve in which the pump shaft is journalled, an impeller secured to the inner 'end of said pump shaft, the side flanges of said impeller bein at substantially right angles to the axis 0 the pump shaft, a wearing strip mounted on the impeller hub and thereto, the inner face of said plate ring bea ing in contact with the outer face of said plate rings and inner casing members, a pair 7 v of annular water spaces disposed on opposite having a bearing in said central sleeve, a wearing ring secured to the front face of sald impeller, the inner face of said ring being contacted with a flange member carried by an inner casing member, an annular plate recessed in said spiral casing on the intake side thereof and having a plate ring'secured wearing ring, and a second annular plate and plate ring recessed in the shaft side of said spiral casing, said first and second mentioned annular platesforming, together with said sides of the impeller and from which water is 

